package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.OrderService;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Slf4j
@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end的所有日期
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天营业额
        List<Double> turnoverList = new ArrayList<>();



        //遍历dateList集合，查询每天的订单数量
        for (LocalDate date : dateList) {
            //查询date日期的订单数量
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap<>();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            if (turnover == null) {
                turnover = 0.0;
            }
            turnoverList.add(turnover);
        }


        log.info("统计时间段内的订单数量：{}到{}", begin, end);
        //封装返回结果
        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();

    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end的所有日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天新增用户数
        List<Integer> newUserList = new ArrayList<>();
        //存放每天总用户数
        List<Integer> totalUserList = new ArrayList<>();
        //遍历dateList集合，查询每天总用户数量
        for (LocalDate date : dateList) {
            //查询date日期的订单数量
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("end", endTime);
            Integer totalUser = userMapper.countByMap(map);
            if (totalUser == null) {
                totalUser = 0;
            }
            totalUserList.add(totalUser);
            //查询date日期的新增用户数量
            map.put("begin", beginTime);
            Integer newUser = userMapper.countByMap(map);
            if (newUser == null) {
                newUser = 0;
            }
            newUserList.add(newUser);

        }
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .build();
    }

    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end的所有日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天订单数量
        List<Integer> orderCountList = new ArrayList<>();
        //存放每天有效订单数量
        List<Integer> validOrderCountList = new ArrayList<>();
        //存放指定时间段内的订单数量
        Integer totalOrderCount = 0;
        //存放指定时间段内的有效订单数量
        Integer validOrderCount = 0;
        //遍历dateList集合
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            Integer orderCount = orderMapper.countByMap(map);
            if (orderCount == null) {
                orderCount = 0;
            }
            orderCountList.add(orderCount);
            totalOrderCount += orderCount;
            map.put("status", Orders.COMPLETED);
            Integer validOrder = orderMapper.countByMap(map);
            if (validOrder == null) {
                validOrder = 0;
            }
            validOrderCountList.add(validOrder);
            validOrderCount += validOrder;
        }
        return OrderReportVO
               .builder()
               .dateList(StringUtils.join(dateList, ","))
               .orderCountList(StringUtils.join(orderCountList, ","))
               .validOrderCountList(StringUtils.join(validOrderCountList, ","))
               .totalOrderCount(totalOrderCount)
               .validOrderCount(validOrderCount)
               .build();
    }

    @Override
    public SalesTop10ReportVO getTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);
        //top10商品名称
        List<String> nameList = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        //top10商品售出数量
        List<Integer> numberList = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());

        return SalesTop10ReportVO
               .builder()
               .nameList(StringUtils.join(nameList, ","))
               .numberList(StringUtils.join(numberList, ","))
               .build();
    }
    /**
     * 导出运营数据报表
     * @param response
     * @return
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //查询数据库，获取运营数据
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        //查询概览数据
        BusinessDataVO businessData = workspaceService.getBusinessData(beginTime, endTime);

        //通过POI将运营数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //将模版文件创建一个新的Excel文件对象
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //填充数据

            //填充日期单元格

            //获取表格文件的第一个Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue("时间 ："+begin + "至" + end);

            //获得第4行
            XSSFRow row4 = sheet.getRow(3);
            row4.getCell(2).setCellValue(businessData.getTurnover());
            row4.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row4.getCell(6).setCellValue(businessData.getNewUsers());

            //获得第5行
            XSSFRow row5 = sheet.getRow(4);
            row5.getCell(2).setCellValue(businessData.getValidOrderCount());
            row5.getCell(4).setCellValue(businessData.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                BusinessDataVO businessData1 = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN),
                        LocalDateTime.of(date, LocalTime.MAX));

                XSSFRow row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData1.getTurnover());
                row.getCell(3).setCellValue(businessData1.getValidOrderCount());
                row.getCell(4).setCellValue(businessData1.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData1.getUnitPrice());
                row.getCell(6).setCellValue(businessData1.getNewUsers());



            }

            //通过Servlet提供的API，将Excel文件通过网络响应给前端
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();

        } catch (IOException e) {
            throw new RuntimeException(e);
        }


    }
}
